Sure everything is connected right?
clock cards connected to each other right with a bnc cable?
Termination on the HDR clock card set right? (there's a pushbutton switch back there...)
Midi cables connected right? (I believe the play/stop/fwd/bwd buttons require midi...)
If those are correct, do you have other equipment you could use to do some error search with?
(Personlally I have a MOTU ultralite avb that I use to check whether the midi and lightpipe is working correctly. )
Have you checked through this guide:
http://www.sonido-7.com/d8b/wordclock.html